file location
Hi
the graphic is called by over 34 files
the path to the graphic is
<img src="images/adminlogo.png" />
So you can either rename your graphic to adminlogo.png or do a find and replace on adminlogo.png
You also could try editing this tdreamweaver template if you have Dreamweaver
webassist\themes\Default\templates\admin.dwt.php
HTH
Ian